Fix eval warning: stdenv.hostPlatform.system

flake.nix

@@ -57,7 +57,7 @@
         '';
       in lib.mkIf cfg.enable {
         home.sessionVariables.FRAJTANO_DIR = cfg.dir;
-        home.packages = [self.packages.${pkgs.system}.default];
+        home.packages = [self.packages.${pkgs.stdenv.hostPlatform.system}.default];
 
         systemd.user.services.frajtano = {
           Unit.Description = "frajtano";